Counties in Illinois by natural change, July to June, 2025
Cook County had the highest natural change, July to June of 102 counties in 2025, at 9,144. Madison County had the lowest, at -651. The median was -65 and the figure for Illinois was 10,903. Source: the U.S. Census Bureau.
Top 40 counties, 2025
Full ranking
| Rank | Counties | 2025 | Change on 2024 |
|---|---|---|---|
| 1 | Cook County Estimated | 9,144 | -1.8% |
| 2 | DuPage County Estimated | 2,873 | -1.1% |
| 3 | Will County Estimated | 1,841 | +0.5% |
| 4 | Kane County Estimated | 1,808 | +0.7% |
| 5 | Lake County Estimated | 1,330 | -4.3% |
| 6 | Kendall County Estimated | 782 | -1.1% |
| 7 | Champaign County Estimated | 470 | +0.6% |
| 8 | McHenry County Estimated | 406 | -7.3% |
| 9 | McLean County Estimated | 318 | -3% |
| 10 | Rock Island County Estimated | 176 | +375.7% |
| 11 | DeKalb County Estimated | 162 | -6.9% |
| 12 | Peoria County Estimated | 72 | -12.2% |
| 13 | Boone County Estimated | 51 | -1.9% |
| 14 | Douglas County Estimated | 48 | -18.6% |
| 15 | Effingham County Estimated | 18 | -5.3% |
| 16 | Grundy County Estimated | 17 | +13.3% |
| 17 | Calhoun County Estimated | 2 | -60% |
| 18 | Moultrie County Estimated | 0 | -100% |
| 19 | Woodford County Estimated | -6 | -500% |
| 20 | Brown County Estimated | -7 | -16.7% |
| 21 | Stark County Estimated | -8 | -14.3% |
| 22 | Scott County Estimated | -12 | -33.3% |
| 22 | Warren County Estimated | -12 | 0% |
| 24 | Hardin County Estimated | -14 | +6.7% |
| 25 | Putnam County Estimated | -15 | -36.4% |
| 26 | Clinton County Estimated | -17 | -1,600% |
| 26 | Hamilton County Estimated | -17 | -54.5% |
| 26 | Washington County Estimated | -17 | -88.9% |
| 29 | Cass County Estimated | -19 | -18.8% |
| 30 | Cumberland County Estimated | -21 | -10.5% |
| 31 | Edwards County Estimated | -25 | -19% |
| 31 | Henderson County Estimated | -25 | +16.7% |
| 33 | Pulaski County Estimated | -31 | 0% |
| 34 | Coles County Estimated | -32 | -14.3% |
| 35 | Crawford County Estimated | -35 | -75% |
| 35 | Jackson County Estimated | -35 | -40% |
| 37 | Clay County Estimated | -36 | +2.7% |
| 37 | Schuyler County Estimated | -36 | -5.9% |
| 39 | Pope County Estimated | -38 | -5.6% |
| 40 | Bond County Estimated | -41 | -13.9% |
| 40 | Johnson County Estimated | -41 | -20.6% |
| 40 | Menard County Estimated | -41 | -13.9% |
| 43 | Alexander County Estimated | -44 | -10% |
| 44 | Piatt County Estimated | -48 | -9.1% |
| 45 | Mercer County Estimated | -51 | +20.3% |
| 46 | Gallatin County Estimated | -54 | -12.5% |
| 46 | Pike County Estimated | -54 | -12.5% |
| 48 | Jasper County Estimated | -57 | -9.6% |
| 49 | Marshall County Estimated | -59 | -7.3% |
| 50 | Ogle County Estimated | -60 | -9.1% |
| 51 | Wayne County Estimated | -64 | -33.3% |
| 52 | Winnebago County Estimated | -65 | -66.7% |
| 53 | Adams County Estimated | -67 | -34% |
| 53 | Wabash County Estimated | -67 | -42.6% |
| 55 | Perry County Estimated | -68 | -25.9% |
| 56 | Fayette County Estimated | -71 | -12.7% |
| 57 | Carroll County Estimated | -72 | +4% |
| 58 | Henry County Estimated | -74 | +24.5% |
| 59 | Greene County Estimated | -76 | -8.6% |
| 60 | Lawrence County Estimated | -77 | -26.2% |
| 61 | Christian County Estimated | -79 | -6.8% |
| 61 | Jefferson County Estimated | -79 | -1.3% |
| 63 | Hancock County Estimated | -80 | -6.7% |
| 64 | Jo Daviess County Estimated | -82 | +8.9% |
| 65 | Shelby County Estimated | -86 | -4.9% |
| 66 | Montgomery County Estimated | -92 | -12.2% |
| 67 | Ford County Estimated | -94 | -13.3% |
| 68 | De Witt County Estimated | -95 | -9.2% |
| 69 | Logan County Estimated | -97 | -5.4% |
| 70 | Clark County Estimated | -98 | -25.6% |
| 70 | Richland County Estimated | -98 | -18.1% |
| 72 | McDonough County Estimated | -106 | -10.4% |
| 73 | Mason County Estimated | -107 | -2.9% |
| 73 | White County Estimated | -107 | -21.6% |
| 75 | Bureau County Estimated | -112 | -0.9% |
| 76 | Jersey County Estimated | -116 | -3.6% |
| 76 | Livingston County Estimated | -116 | -6.4% |
| 78 | Morgan County Estimated | -117 | -1.7% |
| 79 | Union County Estimated | -118 | -2.6% |
| 80 | Iroquois County Estimated | -120 | -6.2% |
| 81 | Marion County Estimated | -121 | -9% |
| 82 | Randolph County Estimated | -126 | -16.7% |
| 83 | Massac County Estimated | -133 | -4.7% |
| 84 | Williamson County Estimated | -136 | -2.3% |
| 85 | Lee County Estimated | -137 | -7% |
| 86 | Edgar County Estimated | -139 | -19.8% |
| 87 | Kankakee County Estimated | -153 | -1.3% |
| 87 | Sangamon County Estimated | -153 | -31.9% |
| 89 | Saline County Estimated | -159 | -5.3% |
| 90 | Franklin County Estimated | -161 | -4.5% |
| 91 | Monroe County Estimated | -173 | -41.8% |
| 92 | Vermilion County Estimated | -187 | 0% |
| 93 | Stephenson County Estimated | -210 | -18% |
| 94 | Macoupin County Estimated | -212 | -1% |
| 95 | Fulton County Estimated | -215 | -0.5% |
| 96 | Whiteside County Estimated | -217 | +1.4% |
| 97 | Knox County Estimated | -233 | -3.1% |
| 98 | Tazewell County Estimated | -269 | -5.1% |
| 99 | LaSalle County Estimated | -287 | -7.5% |
| 100 | Macon County Estimated | -334 | -5.7% |
| 101 | St. Clair County Estimated | -501 | -29.5% |
| 102 | Madison County Estimated | -651 | -23.8% |
Other periods
About this ranking
Estimated births minus deaths of residents from July 1 of the previous year through June 30 of the reported year. A negative value means more deaths than births.
Equals births_july_june minus deaths_july_june for the same place and year. Not a calendar-year figure.
Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.
How to cite
U.S. Census Bureau. Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.Citation styles
APA 7
U.S. Census Bureau. (2026). Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021 (Counties in Illinois by natural change, July to June, 2025) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html
MLA 9
Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021, Counties in Illinois by natural change, July to June, 2025. U.S. Census Bureau, 26 Mar. 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/natural-change-july-june/illinois-counties. Accessed 12 Oct. 2026.
Chicago (author-date)
U.S. Census Bureau. 2026. Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. Counties in Illinois by natural change, July to June, 2025. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/natural-change-july-june/illinois-counties.
Harvard
U.S. Census Bureau (2026) Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021, Counties in Illinois by natural change, July to June, 2025 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/natural-change-july-june/illinois-counties (Accessed: 12 October 2026).
BibTeX
@misc{census_counties_in_illinois_by_2025,
author = {{U.S. Census Bureau}},
title = {{Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021: Counties in Illinois by natural change, July to June, 2025}},
year = {2026},
howpublished = {Data set},
url = {https://www.census.gov/programs-surveys/popest/data/data-sets.html},
urldate = {2026-10-12},
note = {Accessed via Invokely, https://invokely.ai/rankings/natural-change-july-june/illinois-counties. Publisher attribution: U.S. Census Bureau. Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.},
}
RIS
TY - DATA
AU - U.S. Census Bureau
TI - Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021: Counties in Illinois by natural change, July to June, 2025
PY - 2026
DA - 2026/03/26
PB - U.S. Census Bureau
DB - Invokely
UR - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2 - https://invokely.ai/rankings/natural-change-july-june/illinois-counties
Y2 - 2026/10/12
N1 - Accessed via Invokely, https://invokely.ai/rankings/natural-change-july-june/illinois-counties.
N1 - Publisher attribution: U.S. Census Bureau. Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
ER -
Use this data in your AI agent
Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:
Rank Counties in Illinois by natural change, July to June using official data, and cite the source.
rank_places {"indicator":"natural_change_july_june","level":"province","within":"Illinois","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=natural_change_july_june&level=province&within=Illinois&limit=10Questions
Which county has the highest natural change, July to June?
Cook County, with 9,144 in 2025, according to the U.S. Census Bureau.
Which county has the lowest natural change, July to June?
Madison County, with -651 in 2025.
Where does this ranking come from?
Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. Retrieved 2026-10-12.